Ferrite core

Patent metadata

Field	Value
Publication number	US-2022157508-A1
Application number	US-202117522532-A
Country	US
Kind code	A1
Filing date	Nov 9, 2021
Priority date	Nov 18, 2020
Publication date	May 19, 2022
Grant date	—

Abstract

A ferrite core 10 includes a through hole 11 in which a wire 40 is arranged, and a holding portion 60 provided to hold the wire 40 in this through hole 11 . The holding portion 60 may include a plurality of projections 61, 62 projecting from the inner peripheral surface of the through hole 11 . Further, the plurality of projections 61, 62 are arranged at an interval in a length direction of the through hole 11 and at positions different in a circumferential direction of the through hole 11.

First claim

What is claimed is:

1 . A ferrite core, comprising:
a through hole, a wire being arranged in the through hole; and a holding portion provided to hold the wire in the through hole.

2 . The ferrite core of claim 1 , wherein:
the holding portion includes a plurality of projections projecting from an inner peripheral surface of the through hole, and the plurality of projections are arranged at an interval in a length direction of the through hole and at positions different in a circumferential direction of the through hole.

3 . The ferrite core of claim 2 , wherein:
the wire is such a coated wire that a core is surrounded around by a coating, and the core is exposed in a tip part, and a relational expression of b<a<c is satisfied when a denotes an opening diameter of a virtual circle defined by inner peripheral edges of the plurality of projections when the through hole is viewed from the length direction, b denotes an outer diameter of the core and c denotes an outer diameter of the coating.

4 . The ferrite core of claim 2 , wherein at least one of the plurality of projections is provided in an opening of the through hole.

5 . The ferrite core of claim 1 , wherein the holding portion is entirely provided in the through hole.

Assignees

• Sumitomo Wiring Systems

Inventors

• Nobukuni Takashi

Classifications

• H01F3/00 Primary

  Cores, Yokes, or armatures (magnetic materials H01F1/00; permanent magnets H01F7/02) · CPC title

• H01F27/306

  Fastening or mounting coils or windings on core, casing or other support · CPC title

• H01F17/06 Primary

  with core substantially closed in itself, e.g. toroid · CPC title

• H01F27/04

  Leading of conductors or axles through casings, e.g. for tap-changing arrangements · CPC title

• H01F2017/065

  Core mounted around conductor to absorb noise, e.g. EMI filter · CPC title